Method and Device for Encoding Speech Using Open-Loop Pitch Analysis

1. A speech encoder comprising: a sampler to generate samples from a speech signal; a linear predictive coding (LPC) device to produce a first set of linear predication (LP) coefficients based on the samples, and to produce spectral representations from the first set of LP coefficients; an interpolator to interpolate the spectral representations to generate interpolated spectral representations; a spectral device to convert the interpolated spectral representations to a second set of LP coefficients; a pitch analyzer to perform open-loop pitch analysis with the second set of LP coefficients; and a bit packing device to transmit encoded speech comprising a codebook index.

2. The speech encoder of claim 1 , wherein a residual signal is associated with the pitch analyzer.

3. The speech encoder of claim 2 , wherein the codebook index is based on the residual signal.

4. The speech encoder of claim 1 , wherein the sampler is samples the speech signal at a sampling rate of 8 kHz.

5. A method for encoding speech, the method comprising: sampling a speech signal to generate samples; producing spectral representations from the samples; interpolating the spectral representations to generate interpolated spectral representations; performing open-loop pitch analysis based on the interpolated spectral representation; and transmitting encoded speech comprising a codebook index.

6. The method of claim 5 , wherein a residual signal is associated with the open-loop pitch analysis.

7. The method of claim 6 , wherein the codebook index is based on the residual signal.

8. The method of claim 5 , wherein a sampling rate of the speech signal is 8 kHz.

9. A method for encoding speech, the method comprising: sampling a speech signal to generate samples; producing a first set of linear predication (LP) coefficients based on the samples; producing spectral representations from the first set of LP coefficients; interpolating the spectral representations to generate interpolated spectral representations; converting the interpolated spectral representations to a second set of LP coefficients; performing open-loop pitch analysis with the second set of LP coefficients; and transmitting encoded speech comprising a codebook index.

10. The method of claim 9 , wherein a sampling rate of the speech signal is 8 kHz.

11. The method of claim 9 , wherein a residual signal is associated with the open-loop pitch analysis.

12. The method of claim 11 , wherein the codebook index is based on the residual signal.

13. A speech encoder comprising: a sampler to generate samples from a speech signal; a linear predictive coding (LPC) device to produce spectral representations from the samples; an interpolator to interpolate the spectral representations to generate interpolated spectral representations; a pitch analyzer to perform open-loop pitch analysis based on the interpolated spectral representations; and a bit packing device to transmit encoded speech comprising a codebook index.

14. The speech encoder of claim 13 , wherein a residual signal is associated with the pitch analyzer.

15. The speech encoder of claim 14 , wherein the codebook index is based on the residual signal.

16. The speech encoder of claim 13 , wherein the sampler is samples the speech signal at a sampling rate of 8 kHz.